Quarterly report pursuant to Section 13 or 15(d)

INVESTMENTS IN REAL ESTATE AND OTHER SECURITIES - Narrative (Details)

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INVESTMENTS IN REAL ESTATE AND OTHER SECURITIES - Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Debt Securities, Available-for-sale [Line Items]    
Provision for credit losses on securities $ 44,149 $ 7,516
Agency RMBS    
Debt Securities, Available-for-sale [Line Items]    
Face amount of securities sold, unsettled 2,800,000 6,800,000
Proceeds from sale of AFS, unsettled 2,900,000 7,000,000
Face amount of securities purchased   200,000
Purchase of real estate securities, unsettled   200,000
Non-Agency    
Debt Securities, Available-for-sale [Line Items]    
Face amount of securities sold, unsettled 6,100,000  
Proceeds from sale of AFS, unsettled $ 3,300,000 3,800
Purchase of real estate securities, unsettled   $ 3,400